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Finding the Fourth Proportional to 999.13, 1,498.91 and 305.89

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Solution

The fourth proportional to 999.13, 1,498.91 and 305.89 is: 458.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.13 : 1,498.91 = 305.89 : x
  2. Step 2: Convert to fraction form
    999.13/1,498.91 = 305.89/x
  3. Step 3: Cross multiply
    999.13x = 1,498.91 × 305.89
  4. Step 4: Simplify right side
    999.13x = 458,501.58
  5. Step 5: Solve for x
    x = 458,501.58/999.13
  6. Step 6: Final answer
    x = 458.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.